1592020080 XR72CX GB m&M r1.1 27.03.2015
XR72CX
3/4
Au2 High temperature alarm of condenser
:
(-55÷150°C) when this temperature is reached the
HA2 alarm is signalled, possibly after the Ad2 delay.
AH2 Differential for temperature condenser alarm recovery
:
(0,1÷25,5°C; 1÷45°F)
Ad2 Condenser temperature alarm delay
: (0÷255 min) time interval between the detection of the
condenser alarm condition and alarm signalling.
dA2 Condenser temperature alarm exclusion at start up
: (from 0.0 min to 23.5h, res. 10min)
bLL Compressor off with low temperature alarm of condenser
:
n = no:
compressor keeps on
working
; Y = yes,
compressor is switched off till the alarm is present, in any case regulation
restarts after AC time at minimum.
AC2 Compressor off with high temperature alarm of condenser
:
n = no:
compressor keeps on
working
; Y = yes,
compressor is switched off till the alarm is present, in any case regulation
restarts after AC time at minimum.
DIGITAL INPUT
i1P Digital input polarity: oP:
the digital input is activated by opening the contact;
CL:
the digital
input is activated by closing the contact.
i1F Digital input configuration: EAL
= external alarm: “EA” message is displayed;
bAL
= serious
alarm “CA” message is displayed.
PAL
= pressure switch alarm, “CA” message is displayed;
dor
= door switch function;
dEF
= activation of a defrost cycle;
AUS
=not enabled;
Htr
= kind of
action inversion (cooling – heating);
FAn = not set it; ES =
Energy saving.
did
:
(0
255 min)
with
i1F= EAL or i1F = bAL digital input alarm delay:
delay between the
detection of the external alarm condition and its signalling.
with
i1F= dor: door open signalling delay
with i1F = PAL: time for pressure switch function:
time interval to calculate the number of
the pressure switch activation.
nPS Pressure switch number:
(0
15) Number of activation of the pressure switch, during the “
did
”
interval, before signalling the alarm event (I2F= PAL).
If the nPS activation in the did time is reached, switch off and on the instrument to
restart normal regulation.
odc Compressor and fan status when open door:
no
= normal;
Fan
= Fan OFF;
CPr
=
Compressor OFF;
F_C
= Compressor and fan OFF.
rrd Outputs restart after doA alarm: no =
outputs not affected by the doA alarm;
yES =
outputs
restart with the doA alarm;
HES Temperature increase during the Energy Saving cycle :
(-30,0°C
30,0°C/-22÷86°F) it sets
the increasing value of the set point during the Energy Saving cycle.
OTHER
Adr Serial address
(1÷244): Identifies the instrument address when connected to a ModBUS
compatible monitoring system.
PbC Type of probe:
it allows to set the kind of probe used by the instrument:
PbC
= PBC probe,
ntc
=
NTC probe.
onF on/off key enabling: nu =
disabled;
oFF =
enabled;
ES = not set it
.
dP1 Thermostat probe display
dP2 Evaporator probe display
dP3 Third probe display
-
optional
.
dP4 Fourth probe display
.
rSE Real set point:
it shows the set point used during the energy saving cycle or during the
continuous cycle.
rEL Software release
for internal use
.
Ptb Parameter table code:
readable only
.
8.
DIGITAL INPUT (ENABLED WITH P3P = N)
The free voltage digital input is programmable in different configurations by the “
i1F
” parameter.
8.1
DOOR SWITCH INPUT (i1F = dor)
It signals the door status and the corresponding relay output status through the “
odc
” parameter:
no
= normal (any change);
Fan
= Fan OFF;
CPr
= Compressor OFF;
F_C
= Compressor and fan OFF.
Since the door is opened, after the delay time set through parameter “
did
”, the door alarm is
enabled, the display shows the message “
dA
” and
the regulation restarts is rtr = yES.
The alarm
stops as soon as the external digital input is disabled again. With the door open, the high and low
temperature alarms are disabled.
8.2
GENERIC ALARM (i1F = EAL)
As soon as the digital input is activated the unit will wait for “
did
” time delay before signalling the
“
EAL
” alarm message. The outputs status don’t change. The alarm stops just after the digital input is
de-activated.
8.3
SERIOUS ALARM MODE (i1F = bAL)
When the digital input is activated, the unit will wait for “
did
” delay before signalling the “
CA
” alarm
message. The relay outputs are switched OFF. The alarm will stop as soon as the digital input is de-
activated.
8.4
PRESSURE SWITCH (i1F = PAL)
If during the interval time set by “
did
” parameter, the pressure switch has reached the number of
activation of the “
nPS
” parameter, the “
CA
” pressure alarm message will be displayed. The
compressor and the regulation are stopped. When the digital input is ON the compressor is always
OFF.
If the nPS activation in the did time is reached, switch off and on the instrument to
restart normal regulation.
8.5
START DEFROST (i1F = dFr)
It starts a defrost if there are the right conditions. After the defrost is finished, the normal regulation
will restart only if the digital input is disabled otherwise the instrument will wait until the “MdF” safety
time is expired.
8.6
INVERSION OF THE KIND OF ACTION: HEATING-COOLING (i1F = Htr)
This function allows to invert the regulation of the controller: from cooling to heating and viceversa.
8.7
ENERGY SAVING (i1F = ES)
The Energy Saving function allows to change the set point value as the result of the SET+ HES
(parameter) sum. This function is enabled until the digital input is activated.
8.8
DIGITAL INPUTS POLARITY
The digital input polarity depends on the “
i1P
” parameter.
i1P=CL
: the input is activated by closing the contact.
i1P=OP
: the input is activated by opening the contact
9.
TTL SERIAL LINE – FOR MONITORING SYSTEMS
The TTL serial line, available through the HOT KEY connector, allows by means of the external
TTL/RS485 converter,
XJ485-CX
, to connect the instrument to a monitoring system
ModBUS-RTU
compatible such as the X-WEB500/3000/300.
10.
X-REP OUTPUT – OPTIONAL
As optional, an X-REP can be connected to the instrument, trough the HOY KEY
connector. The X-REP output
EXCLUDES
the serial connection.
To connect the X-REP to the
instrument the following connectors
must be used CAB-51F(1m), CAB-
52F(2m), CAB-55F(5m),
11.
INSTALLATION AND MOUNTING
Instrument
XR72CX
shall be mounted on vertical panel, in a
29x71 mm hole, and fixed using the special bracket supplied.
The temperature range allowed for correct operation is 0
60 °C.
Avoid places subject to strong vibrations, corrosive gases,
excessive dirt or humidity. The same recommendations apply to
probes. Let air circulate by the cooling holes.
12.
ELECTRICAL CONNECTIONS
The instrument is provided with screw terminal block to connect cables with a cross section up to 2,5
mm
2
. Before connecting cables make sure the power supply complies with the instrument’s
requirements. Separate the probe cables from the power supply cables, from the outputs and the
power connections. Do not exceed the maximum current allowed on each relay, in case of heavier
loads use a suitable external relay.
12.1
PROBE CONNECTION
The probes shall be mounted with the bulb upwards to prevent damages due to casual liquid
infiltration. It is recommended to place the thermostat probe away from air streams to correctly
measure the average room temperature. Place the defrost termination probe among the evaporator
fins in the coldest place, where most ice is formed, far from heaters or from the warmest place during
defrost, to prevent premature defrost termination.
13.
HOW TO USE THE HOT KEY
13.1
HOW TO PROGRAM A HOT KEY FROM THE INSTRUMENT (UPLOAD)
1.
Program one controller with the front keypad.
2.
When the controller is ON, insert the “
Hot key
” and push
o
key; the
"uPL"
message
appears followed a by flashing
“End”
3.
Push “
SET”
key and the
End
will stop flashing.
4.
Turn OFF the instrument remove the
“Hot Key”,
then turn it ON again.
NOTE
: the “
Err
” message is displayed for failed programming. In this case push again
o
key if you
want to restart the upload again or remove the “
Hot key
” to abort the operation.
13.2
HOW TO PROGRAM AN INSTRUMENT USING A HOT KEY
(DOWNLOAD)
1.
Turn OFF the instrument.
2.
Insert a
programmed “Hot Key” into the 5 PIN receptacle
and then turn the Controller ON.
3.
Automatically the parameter list of the
“Hot Key”
is downloaded into the Controller memory,
the “
doL
” message is blinking followed a by flashing
“End”.
4.
After 10 seconds the instrument will restart working with the new parameters.
5.
Remove the
“Hot Key”.
.
NOTE
the message “
Err
” is displayed for failed programming. In this case turn the unit off and then
on if you want to restart the download again or remove the “
Hot key
” to abort the operation.
14.
ALARM SIGNALS
Message
Cause
Outputs
“P1”
Room probe failure
Compressor output acc. to par. “Con” and “COF”
“P2”
Evaporator probe failure
Defrost end is timed
“P3”
Third probe failure
Outputs unchanged
“P4”
Fourth probe failure
Outputs unchanged
“HA”
Maximum temperature alarm
Outputs unchanged.
“LA”
Minimum temperature alarm
Outputs unchanged.
"HA2"
Condenser high temperature
It depends on the “Ac2” parameter
"LA2"
Condenser low temperature
It depends on the “bLL” parameter
“dA”
Door open
Compressor and fans restarts
“EA”
External alarm
Output unchanged.
“CA”
Serious external alarm (i1F=bAL) All outputs OFF.
“CA”
Pressure switch alarm (i1F=PAL) All outputs OFF
14.1
ALARM RECOVERY
Probe alarms
P1
”, “
P2”,
“
P3
” and “
P4
” start some seconds after the fault in the related probe; they
automatically stop some seconds after the probe restarts normal operation. Check connections
before replacing the probe.
Temperature alarms “
HA
”, “
LA
” “
HA2
” and “
LA2
” automatically stop as soon as the temperature
returns to normal values.
Alarms
“EA”
and
“CA”
(with i1F=bAL)
recover as soon as the digital input is disabled.
Alarm “
CA”
(with i1F=PAL) recovers only by
switching off and on
the instrument.
